Encapsulated submillimeter piezoresistive accelerometers

While micromachined accelerometers are widely available and used in various applications, some biomedical applications require extremely small dimensions (相似文献   

AudioBrowser: a mobile browsable information access for the visually impaired

Although a large amount of research has been conducted on building interfaces for the visually impaired that allows users to read web pages and generate and access information on computers, little development addresses two problems faced by the blind users. First, sighted users can rapidly browse and select information they find useful, and second, sighted users can make much useful information portable through the recent proliferation of personal digital assistants (PDAs). These possibilities are not currently available for blind users. This paper describes an interface that has been built on a standard PDA and allows its user to browse the information stored on it through a combination of screen touches coupled with auditory feedback. The system also supports the storage and management of personal information so that addresses, music, directions, and other supportive information can be readily created and then accessed anytime and anywhere by the PDA user. The paper describes the system along with the related design choices and design rationale. A user study is also reported.     

Experimental and theoretical studies of the steady-state and dynamic behaviour of packed columns

Experimental studies were made with the help of laboratory-scale distillation column. Concentration and temperature profiles were obtained at the steady-state operating point, and transition behaviour was observed after specific changes were made to relevant process variables. These results were compared with results obtained by means of simulation calculations. The mathematical model is explained in detail, as is the study method employed. The aim of this study was to obtain experimental verification of steady-state and dynamic calculation methods. It was found that the simulation results agreed closely with those obtained experimentally. The experimental findings thus confirmed the accuracy of the model and its underlying assumptions.     

Urokinase induces proliferation of human ovarian cancer cells: characterization of structural elements required for growth factor function

It has been well established that the cytoskeleton is an essential modulator of cell morphology and motility, intracytoplasmic transport and mitosis, however cytoskeletal linkage to the organelles has not been unequivocally demonstrated. Indeed, cytoskeleton appears to be essential in determining and modulating gene phenotype as a function of cellular environment. According to recent studies, the organization of the cytoskeleton network together with associated protein(s) could be essential in regulating mitochondrial function and particularly the permeability of the mitochondrial outer membrane to ADP. The aim of this chapter is to summarize the main properties of the cytoskeletal environment of mitochondria and the possible role(s) of this network in mitochondrial function in myocytes.     

IV. Referate

Ohne Zusammenfassung     

Thermomechanical calculations related to thermally induced rock loosening in an underground cavity

Zones of loosening, together with failure probability and safety factors, can be used to characterize the stability of underground caverns. The effect of a cylindrical heat source on the surrounding rock salt has been investigated in an in situ test carried out in a rock salt mass at a depth of about 750 m. The results of the calculations were confirmed by comparison with the temperatures and displacements measured during the in situ experiment.     

Information transport and computation in nanometre-scale structures

We discuss two examples of novel information-transport and processing mechanisms in nanometre-scale structures. The local modulation and detection of a quantum state can be used for information transport at the nanometre length-scale, an effect we call a 'quantum mirage'. We demonstrate that, unlike conventional electronic information transport using wires, the quantum mirage can be used to pass multiple channels of information through the same volume of a solid. We discuss a new class of nanometre-scale structures called 'molecule cascades', and show how they may be used to implement a general-purpose binary-logic computer in which all of the circuitry is at the nanometre length-scale.     

Improving generalization capabilities of dynamic neural networks

This work addresses the problem of improving the generalization capabilities of continuous recurrent neural networks. The learning task is transformed into an optimal control framework in which the weights and the initial network state are treated as unknown controls. A new learning algorithm based on a variational formulation of Pontrayagin's maximum principle is proposed. Under reasonable assumptions, its convergence is discussed. Numerical examples are given that demonstrate an essential improvement of generalization capabilities after the learning process of a dynamic network.